OG forums not displayed for normal users

I am using CVS version 1.11.2.8. I am able to see group forums when logged in as the administrator (user 1) but never under other users, The users have all permissions for forums (access control) and they could view and use the forums on the previous versions of og forums

around line 117 there is a line of code

    $forums = forum_get_forums($tid);

If the the admin is using the website, this line of code returns the array of all the group forums. If other users try to view the forums, the value $forums contains only "Array()" and no forums are displayed.

any idea of the problem?

not sure if there is some change in permissions in the CVS version, maybe a new access control rule that is not yet implemented?